State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China.
Inorg Chem. 2023 Apr 10;62(14):5791-5798. doi: 10.1021/acs.inorgchem.3c00422. Epub 2023 Mar 30.
Two organic-inorganic manganese(II) halide hybrids (OIMHs) with formulas of [(TEA)(TMA)]MnCl () and (TPA)(TMA) () (TEA = tetraethylammonium, TMA = tetramethylammonium, and TPA = tetrapropylammonium) were synthesized by a mixed-ligand strategy. Both compounds crystallize in the acentric space group and are composed of isolated [MnCl] tetrahedral units separated by two types of organic cations. They show high thermal stability and emit strong green light with different emission bandwidths, quantum yields, and high-temperature photostability. Remarkably, the quantum yield of can reach up to 99%. Due to the high thermal stability and quantum yield of and , green light-emitting diodes (LEDs) were fabricated. Furthermore, mechanoluminescence (ML) was observed in and when stress was applied. The ML spectrum of is similar to the photoluminescence (PL) spectrum, suggesting ML and PL emissions come from the same transition of Mn(II) ions. Finally, rewritable anticounterfeiting printing and information storage were achieved by utilizing the outstanding photophysical properties and ionic features of the products. The printed images still remain clear after several cycles, and the information stored on the paper can be read out by a UV lamp and commercial mobile phones.
两种有机-无机锰(II)卤化物杂化物（OIMH），化学式分别为[(TEA)(TMA)]MnCl()和(TPA)(TMA)()（TEA=四乙铵，TMA=四甲基铵，TPA=四丙铵），是通过混合配体策略合成的。这两种化合物都结晶在非中心对称空间群中，由两种类型的有机阳离子隔开的孤立[MnCl]四面体单元组成。它们具有较高的热稳定性，发出不同发射带宽、量子产率和高温光稳定性的强绿光。值得注意的是，的量子产率可达 99%。由于和的高热稳定性和量子产率，制备了绿光发光二极管（LED）。此外，在施加应力时，在和中观察到了力学发光（ML）。的 ML 光谱与光致发光（PL）光谱相似，表明 ML 和 PL 发射来自 Mn(II)离子的相同跃迁。最后，通过利用产品的出色光物理性质和离子特性，实现了可重写的防伪印刷和信息存储。打印图像在经过几次循环后仍保持清晰，并且可以通过紫外线灯和商用手机读取存储在纸上的信息。
